CVE-2026-73321

XenForo before 2.3.13 contains an uncontrolled recursion vulnerability in the BBCode parser that allows authenticated attackers to cause persistent denial of service by submitting a post with deeply nested BBCode tags. Attackers can craft a single malicious post with sufficient nesting depth to...

CVE-2026-73321

XenForo before 2.3.13 contains an uncontrolled recursion vulnerability in the BBCode parser . Authenticated attackers can submit a single post with deeply nested BBCode tags sufficient to exceed PHP's stack limit, causing fatal errors that repeatedly terminate PHP-FPM workers for all visitors ren...

EUVD-2026-72758

XenForo before 2.3.13 contains an uncontrolled recursion vulnerability in the BBCode parser that allows authenticated attackers to cause persistent denial of service by submitting a post with deeply nested BBCode tags. Attackers can craft a single malicious post with sufficient nesting depth to...

CVE-2026-73321 XenForo < 2.3.13 Uncontrolled Recursion DoS via BBCode Parser

XenForo before 2.3.13 contains an uncontrolled recursion vulnerability in the BBCode parser that allows authenticated attackers to cause persistent denial of service by submitting a post with deeply nested BBCode tags. Attackers can craft a single malicious post with sufficient nesting depth to...

CVE-2026-73321 XenForo < 2.3.13 Uncontrolled Recursion DoS via BBCode Parser

XenForo before 2.3.13 contains an uncontrolled recursion vulnerability in the BBCode parser that allows authenticated attackers to cause persistent denial of service by submitting a post with deeply nested BBCode tags. Attackers can craft a single malicious post with sufficient nesting depth to...

CVE-2026-73321: Uncontrolled Recursion

XenForo before 2.3.13 contains an uncontrolled recursion vulnerability in the BBCode parser that allows authenticated attackers to cause persistent denial of service by submitting a post with deeply nested BBCode tags. Attackers can craft a single malicious post with sufficient nesting depth to...

PT-2026-87066

XenForo before 2.3.13 contains an uncontrolled recursion vulnerability in the BBCode parser that allows authenticated attackers to cause persistent denial of service by submitting a post with deeply nested BBCode tags. Attackers can craft a single malicious post with sufficient nesting depth to...

PT-2021-4947

Name of the Vulnerable Software and Affected Versions vBulletin affected versions not specified Description The issue is related to the BBCode parser in vBulletin, which fails to properly protect the web page structure. This can be exploited by a remote attacker to execute arbitrary JavaScript co...